/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Selections/GeometrySelection.h
aFGeoSelectionIDinitialized with the given TriangleID, and a TopologyID of 0
static [FGeoSelectionID](API\Plugins\DynamicMesh\Selections\FGeoSelectionID) MeshTriangle ( int32 TriangleID )